The Biochrom WPA CO7000 is a colorimeter used by doctors and medical technologists in small clinics because it is easy to use and carry. It uses single beam filter based spectrophotometer/colorimeter covering 400 to 700 nm.The device is tropicalised so that we can use it in hot and humid temperature and convenient to use for field work. The device has easy three button operation and available at cheap rate. For protecting each part from corrosion, the PCB is evenly coated and the 10 gelatin filters are kept inside the glass to avoid fungal growth. The device can run with the help of internal rechargeable battery if the external power is not dependable. Recharging can be done simultaneously while using it.